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USN-5260-1: Samba vulnerabilities

1 February 2022

Several security issues were fixed in Samba.

Releases

Packages

  • samba - SMB/CIFS file, print, and login server for Unix

Details

Orange Tsai discovered that the Samba vfs_fruit module incorrectly handled
certain memory operations. A remote attacker could use this issue to cause
Samba to crash, resulting in a denial of service, or possibly execute
arbitrary code as root. (CVE-2021-44142)

Michael Hanselmann discovered that Samba incorrectly created directories.
In certain configurations, a remote attacker could possibly create a
directory on the server outside of the shared directory. (CVE-2021-43566)

Kees van Vloten discovered that Samba incorrectly handled certain aliased
SPN checks. A remote attacker could possibly use this issue to impersonate
services. (CVE-2022-0336)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 21.10
Ubuntu 20.04

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

Related notices

  • USN-5260-2: libwbclient0, libparse-pidl-perl, samba-common-bin, libsmbclient, samba-vfs-modules, ctdb, registry-tools, samba, samba-testsuite, libnss-winbind, samba-common, libwbclient-dev, python-samba, samba-libs, libsmbclient-dev, samba-dsdb-modules, samba-dev, winbind, smbclient, libpam-winbind
  • USN-5260-3: libwbclient0, libpam-smbpass, libparse-pidl-perl, samba-common-bin, libsmbclient, samba-doc, samba-vfs-modules, ctdb, registry-tools, samba, libsmbsharemodes0, libsmbsharemodes-dev, samba-testsuite, libnss-winbind, samba-common, libwbclient-dev, python-samba, samba-libs, libsmbclient-dev, samba-dsdb-modules, samba-dev, winbind, smbclient, libpam-winbind